Abel p



(Nomode'l') A.P. HOLGOMB.

' Steam Generator.

)i Patented Aug. 17, 1880.

N-PETERS, PHOTOALITHOGR-APHER. wASx-lxNGTuN. D. C.

. UNITED STATES PATENT OFFICE.

ABEL P. HOLCOMB, OF SILVER GREEK, NEW YORK, ASSIGNOR TO HUNTLEY, HOLOOMB85 HEINE, OF SAME PLAGE.

STEAM-GENERATO R.

SPECIFICATION forming part of Letters Patent No. 231,320, dated August17, 1880.

Application led April 14, 1880.

To all whom it may concern:

Be it known that I, ABEL P. HOLCOMB, of Silver Creek, in the county ofChautauqua and State of New York, have invented new and usefulImprovements in Steam-Genera tors, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to a steam-generator ro which is more especiallydesigned for producing steam under a low pressure for warming1 buildingsand for similar purposes.

The object of my invention is to produce a simple, compact, andeficient-steam-generator in which the ire-passages are not liable tobecome filled with ashes.

My invention consists, principally, of a steamgenerator composed ot'upright water-chambers arranged radially around a common axis zo withintervening upright lire-spaces or iiues, a water-space surrounding there-pot and communicatin g with the lower ends of the uprightwater-chambers, and a steam-chamber arranged above the uprightwater-chambers 2 5 and communicating with the upper ends thereof 5 also,of various details of construction,` as will be fully hereinafter setforth.

In the accompanying drawings, Figure 1 is a sectional elevation of myimproved steam- 3o generator. Fig. 2 is a horizontal section in line mFig. 1. Fig. 3 is a fragmentary horizontal section in line y y, Fig. 1.Fig. 4 is a horizontal section of one of the upright waterchambers on anenlarged scale. Fig. 5 is a 3 5 fragmentary side elevation of the sameon the same scale.

Like letters of reference refer to like parts in the several gures.

A represents the lire-pot of the steamgen- 4o erator, and B thefuel-magazine, arranged centrally above the same.

C is the ash-pit; D, the smoke-flue; and E, the feed-chute, throughwhich the fuel is in troduced into the magazine B.

F represents an annular water-chamber surrounding the tire-pot A, andpreferably cast in one piece therewith. rlhe chamber F is closed at thebottom and sides, and provided at its top with al number of circularopen- 5o ingw (N o model.)

G represents the upright water-chambers, arranged radially around thefuel-magazine B, with their inner sides touching each other, and withtheir outer sides separated, so as to form intervening upright spaces ordues H, through which the iame and hot gases pass from the lire-pot t0the smoke-exit. The chambers G are constructed in the form of hollowflat leaves orboxes, somewhat contracted from their outer to their innersides, and provided 6o at their inner sides with laterally-projectingribs or iianges g, which flt closely against each other when the leavesG are put together, and the inner surfaces of which are curved in thearc of a circle, so that the contiguous inner sides of all the chambersG form a cylindrical fuel-magazine.

If desired, the magazine may be provided with an interior lining, h, ofsheet-iron or other suitable material. o

'i represents an opening formed in the bottom of each chamber G, nearits outer end, and surrounded by a downwardly-projecting boss or collar,i. These bosses z" rest upon the annular top ofthe water-chamber F,which 7 5 surrounds the lire-pot, and the openin gs f are so arranged inthe top of theire-pot that they communicate with the openings z' in thebottom of the chambers G.

lc are similar openings formed in the upper 8o ends ot the chambers G,in a vertical line with the openings i in the bottom of each chamber,and surrounded by a boss or collar, k.

L represents an annular steam chamber or space arranged above thewater-chambers G, and provided in its bottom near its periphery withopenings l, communicating with the openings k in the tops of thewater-chambers G.

m are vertical stay-bolts, which pass through the water-chambers F and Gand the steam- 9o chamber L and the openings fi kl thereof and securethe parts together.

N is a smoke-exit tube, arranged centrally in the steam-chamber L, andconnecting at its upper end with the smoke-Hue D, which leads to thechimney.

O is a cover or horizontal plate, which closes the upper end of themagazine B, with the eX- ception of the feed-chute E, which penetratesthis cover. 10o

The steam-chamber L s arranged at such a distance above the upper endsof the vertical water-ehambersG that a horizontal passage is formedbetween the under side ot' the steamchamber L and the upper sides of thewaterehambers G and the cover of the magazine, through which the hotgases can pass from the lues H to the exit-pipe N.

p are horizontal stay-bolts, arranged at proper distances apart in thehollow chambers G for connecting the tiat sides thereof and pre- Ventingthe expansion of the same by the internal steam-pressure to which theyare subjected.

The chambers G are preferably constructed of cast-iron, and the bolts pare preferably cast in one piece with the chambers; but, if desired,they may be screwed and riveted to the side Walls of the chambers G inthe same inanner in which such stay-bolts are Vapplied to ordinarysteam-boilers.

Q represents the hollow base which incluses the ash-pit G. The base Q isprovided with an annular horizontal top iiange, r, upon the inner edgeof which the boiler proper is supported, as clearly shown in Fig. l.

S represents the inclosing wall or jacket of the boiler, constructed ofbrick or other suitable non-conductor of heat, and supported upon thetop flange, r, ot' the base Q. The jacket or brick-work S rests againstthe outer sides of the water-chambers G, and forms, in connectiontherewith, the upright titles H.

rEhe boiler is supplied with the water-feed pipes, steam-pipes,safcty-valves, and other necessar i appurtenances in an) ordinary andwell-known manner.

The iiame and hot gases generated by the burning fuel in the tire-pot Apass from the fire-pot A upward into and through the vertical lucs ortire-passages II. between the vertical water-chambers G, and thence intothe horizontal space below the steam -cl1amber L, thence inwardly overthe cover of the magazine B to the central exit-pipe, N, whence theyescape into the smoke-liuc I). ln their passage from the tire-pot to thesmoke-tine the gases are eiectually deprived of the heat contained inthem by the thin bodies of water contained in the vertical chambers G,which expose a very large surface to the action ot' the hot gases.

The upright tiues II, formed between the chambers G by the smoothvertical sides oft these chambers, insure a good draft and prevent thclodging of ashes on the same, thus presenting at all times a freeunobstructed surface of lnetal for the absorption of heat from the hotgases passing through these iiues.

I am aware that it is not new, broadly, to form vertical iues betweenthe vertical waterspaces, and that it is not new, broadly, to arrangevertical water-chambers in communication with the water-foot andsteanrchamber, and I do not lay claim thereto; but

'hat I claim as my invention is- 1. In a steam-generator, the separatevertical and elongated water-spaces G, arranged radially around thefuel-magazine B, with their inner sides in contact, and forming acontinuous surface around said magazine, and their outer sidesseparated, in combination with an inclosing jacket or casing, S, wherebyvertical iues are formed between the vertical waterspaces, and a thincompartment of water with an extended surface is presented to the actionof the tire, substantially as and for the purpose set forth. Y

2. The lire-pot A, provided with annular water-chamber F, in combinationwith the intermediate vertical elongated Water-spaces, G, arrangedradially around the magazine B, steam-chamber L, land surroundingjacketS, substantially as and for the purpose set forth.

3. The vertical water chambers G, constructed at their innersides withlaterally-projecting iianges g, by means Ot' which the chambers come incontact with each other and are held in their proper position,substantially as set forth. Y

4. In a steam-generator, the combination ot' 9o IOO

